<template>
  <div>
    <el-upload
      :action="uploadUrl"
      :before-upload="handleBeforeUpload"
      :on-success="handleUploadSuccess"
      :on-error="handleUploadError"
      name="file"
      :show-file-list="false"
      :headers="headers"
      style="display: none"
      ref="upload"
      v-if="this.type == 'url'"
    ></el-upload>
    <div class="editor" ref="editor" :style="styles"></div>
  </div>
</template>

<script>
import Quill from 'quill'
import 'quill/dist/quill.core.css'
import 'quill/dist/quill.snow.css'
import 'quill/dist/quill.bubble.css'
import { getToken } from '@/utils/auth'
import titleConfig from './titleConfig'
var fonts = [
  'SimSun',
  'SimHei',
  'Microsoft-YaHei',
  'KaiTi',
  'FangSong',
  'Arial',
  'Times-New-Roman',
  'sans-serif',
]
var Font = Quill.import('formats/font')
Font.whitelist = fonts //将字体加入到白名单
Quill.register(Font, true)
export default {
  name: 'Editor',
  props: {
    /* 编辑器的内容 */
    value: {
      type: String,
      default: '',
    },
    /* 高度 */
    height: {
      type: Number,
      default: null,
    },
    /* 最小高度 */
    minHeight: {
      type: Number,
      default: null,
    },
    // 上传文件大小限制(MB)
    fileSize: {
      type: Number,
      default: 5,
    },
    /* 类型（base64格式、url格式） */
    type: {
      type: String,
      default: 'url',
    },
  },
  data() {
    return {
      titleConfig,
      uploadUrl: process.env.VUE_APP_BASE_API + '/common/batchUpload', // 上传的图片服务器地址
      headers: {
        Authorization: 'Bearer ' + getToken(),
      },
      Quill: null,
      currentValue: '',
      options: {
        theme: 'snow',
        bounds: document.body,
        debug: 'warn',
        modules: {
          // 工具栏配置
          toolbar: [
            ['bold', 'italic', 'underline', 'strike'], // 加粗 斜体 下划线 删除线
            ['blockquote', 'code-block'], // 引用  代码块
            [{ list: 'ordered' }, { list: 'bullet' }], // 有序、无序列表
            [{ indent: '-1' }, { indent: '+1' }], // 缩进
            [{ size: ['small', false, 'large', 'huge'] }], // 字体大小
            [{ header: [1, 2, 3, 4, 5, 6, false] }], // 标题
            [{ color: [] }, { background: [] }], // 字体颜色、字体背景颜色
            [{ align: [] }], // 对齐方式
            [
              {
                font: fonts,
              },
            ],
            ['clean'], // 清除文本格式
            ['link', 'image', 'video'], // 链接、图片、视频
          ],
        },
        placeholder: '请输入内容',
        readOnly: false,
      },
    }
  },
  computed: {
    styles() {
      let style = {}
      if (this.minHeight) {
        style.minHeight = `${this.minHeight}px`
      }
      if (this.height) {
        style.height = `${this.height}px`
      }
      return style
    },
  },
  watch: {
    value: {
      handler(val) {
        if (val !== this.currentValue) {
          this.currentValue = val === null ? '' : val
          if (this.Quill) {
            this.Quill.pasteHTML(this.currentValue)
          }
        }
      },
      immediate: true,
    },
  },
  mounted() {
    this.init()
  },
  beforeDestroy() {
    this.Quill = null
  },
  methods: {
    initTitle() {
      document.getElementsByClassName('ql-toolbar')[0].dataset.placeholder = ''
      for (let item of this.titleConfig) {
        let tip = document.querySelector('.ql-toolbar ' + item.Choice)
        if (!tip) continue
        tip.setAttribute('title', item.title)
      }
    },
    init() {
      const editor = this.$refs.editor

      this.Quill = new Quill(editor, this.options)

      // 如果设置了上传地址则自定义图片上传事件
      if (this.type == 'url') {
        let toolbar = this.Quill.getModule('toolbar')
        toolbar.addHandler('image', (value) => {
          this.uploadType = 'image'
          if (value) {
            this.$refs.upload.$children[0].$refs.input.click()
          } else {
            this.quill.format('image', false)
          }
        })
      }
      this.Quill.pasteHTML(this.currentValue)
      this.initTitle()
      this.Quill.on('text-change', (delta, oldDelta, source) => {
        const html = this.$refs.editor.children[0].innerHTML
        const text = this.Quill.getText()
        const quill = this.Quill
        this.currentValue = html
        this.$emit('input', html)
        this.$emit('on-change', { html, text, quill })
      })
      this.Quill.on('text-change', (delta, oldDelta, source) => {
        this.$emit('on-text-change', delta, oldDelta, source)
      })
      this.Quill.on('selection-change', (range, oldRange, source) => {
        this.$emit('on-selection-change', range, oldRange, source)
      })
      this.Quill.on('editor-change', (eventName, ...args) => {
        this.$emit('on-editor-change', eventName, ...args)
      })
    },
    // 上传前校检格式和大小
    handleBeforeUpload(file) {
      // 校检文件大小
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize
        if (!isLt) {
          this.$message.error(`上传文件大小不能超过 ${this.fileSize} MB!`)
          return false
        }
      }
      return true
    },
    handleUploadSuccess(res, file) {
      // 获取富文本组件实例
      let quill = this.Quill
      // 如果上传成功
      if (res.code == 200) {
        console.log(res)
        // 获取光标所在位置
        let length = quill.getSelection().index
        // 插入图片  res.url为服务器返回的图片地址
        res.data.map((item) => {
          quill.insertEmbed(length, 'image', item.url)
        })
        // 调整光标到最后
        quill.setSelection(length + 1)
      } else {
        this.$message.error('图片插入失败')
      }
    },
    handleUploadError() {
      this.$message.error('图片插入失败')
    },
  },
}
</script>

<style >
.editor,
.ql-toolbar {
  white-space: pre-wrap !important;
  line-height: normal !important;
}
.quill-img {
  display: none;
}
.ql-snow .ql-tooltip[data-mode='link']::before {
  content: '请输入链接地址:';
}
.ql-snow .ql-tooltip.ql-editing a.ql-action::after {
  border-right: 0px;
  content: '保存';
  padding-right: 0px;
}

.ql-snow .ql-tooltip[data-mode='video']::before {
  content: '请输入视频地址:';
}

.ql-snow .ql-picker.ql-size .ql-picker-label::before,
.ql-snow .ql-picker.ql-size .ql-picker-item::before {
  content: '14px';
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value='small']::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value='small']::before {
  content: '10px';
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value='large']::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value='large']::before {
  content: '18px';
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value='huge']::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value='huge']::before {
  content: '32px';
}

.ql-snow .ql-picker.ql-header .ql-picker-label::before,
.ql-snow .ql-picker.ql-header .ql-picker-item::before {
  content: '文本';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='1']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='1']::before {
  content: '标题1';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='2']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='2']::before {
  content: '标题2';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='3']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='3']::before {
  content: '标题3';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='4']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='4']::before {
  content: '标题4';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='5']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='5']::before {
  content: '标题5';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='6']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='6']::before {
  content: '标题6';
}

.ql-snow .ql-picker.ql-font .ql-picker-label::before,
.ql-snow .ql-picker.ql-font .ql-picker-item::before {
  content: '标准字体';
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value='serif']::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value='serif']::before {
  content: '衬线字体';
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value='monospace']::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value='monospace']::before {
  content: '等宽字体';
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value='SimSun']::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value='SimSun']::before {
  content: '宋体';
  font-family: 'SimSun';
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value='SimHei']::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value='SimHei']::before {
  content: '黑体';
  font-family: 'SimHei';
}
.ql-snow
  .ql-picker.ql-font
  .ql-picker-label[data-value='Microsoft-YaHei']::before,
.ql-snow
  .ql-picker.ql-font
  .ql-picker-item[data-value='Microsoft-YaHei']::before {
  content: '微软雅黑';
  font-family: 'Microsoft YaHei';
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value='KaiTi']::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value='KaiTi']::before {
  content: '楷体';
  font-family: 'KaiTi';
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value='FangSong']::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value='FangSong']::before {
  content: '仿宋';
  font-family: 'FangSong';
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value='Arial']::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value='Arial']::before {
  content: 'Arial';
  font-family: 'Arial';
}
.ql-snow
  .ql-picker.ql-font
  .ql-picker-label[data-value='Times-New-Roman']::before,
.ql-snow
  .ql-picker.ql-font
  .ql-picker-item[data-value='Times-New-Roman']::before {
  content: 'Times New Roman';
  font-family: 'Times New Roman';
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value='sans-serif']::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value='sans-serif']::before {
  content: 'sans-serif';
  font-family: 'sans-serif';
}

.ql-font-SimSun {
  font-family: 'SimSun';
}
.ql-font-SimHei {
  font-family: 'SimHei';
}
.ql-font-Microsoft-YaHei {
  font-family: 'Microsoft YaHei';
}
.ql-font-KaiTi {
  font-family: 'KaiTi';
}
.ql-font-FangSong {
  font-family: 'FangSong';
}
.ql-font-Arial {
  font-family: 'Arial';
}
.ql-font-Times-New-Roman {
  font-family: 'Times New Roman';
}
.ql-font-sans-serif {
  font-family: 'sans-serif';
}
</style>
